Model details
GPT-5.4 mini is a compact variant in OpenAI's GPT-5.4 family, released alongside the even smaller GPT-5.4 nano on March 17, 2026. According to OpenAI's announcement, the model is built to bring many of the strengths of GPT-5.4 into a faster, more efficient package aimed at high-volume workloads where latency directly shapes the product experience, such as responsive coding assistants and subagents that quickly finish supporting tasks.
OpenAI describes GPT-5.4 mini as a meaningful step up from GPT-5 mini, with significant improvements across coding, reasoning, multimodal understanding, and tool use while running more than 2x faster. The release notes indicate that the model approaches the larger GPT-5.4's performance on several evaluations, including SWE-Bench Pro and OSWorld-Verified, making it a practical choice for teams that need near-flagship reasoning and tool reliability in a smaller, lower-latency form factor.
Transparent token rates
Rates are shown per one million tokens. Combined means one million input plus one million output tokens.
GitHub Copilot
GPT 5.4 mini, OpenAI’s latest fast version of their agentic coding model GPT 5.4, is now rolling out in GitHub Copilot. In early tests, GPT‑5.4 mini appears to be OpenAI’s highest performing mini model yet. It delivers the fastest time to first token, is stronger at codebase exploration, and is especially effective whe
Neon
The apxml.com catalog page for GPT-5.4 mini lists it as a closed-source, proprietary OpenAI model released on March 16, 2026, with an undisclosed parameter count and architecture, multimodal input, a 400K context length, and API pricing of $0.75 per 1M input tokens and $4.50 per 1M output tokens. The page notes that GP According to the same page, GPT-5.4 mini supports text and image inputs plus tool use, function calling, web search, file search, computer use, and skills, and is available via the API as gpt-5.4-mini. The page also catalogues published benchmark ranks across GPQA, LiveBench categories, Text Arena, WebDev Arena, and Ar
Vivgrid
Independent EdTech Innovation Hub coverage dated 19 March 2026 reports that OpenAI released GPT-5.4 mini and GPT-5.4 nano, two smaller models designed for high-volume workloads balancing performance, cost, and latency, announced via a LinkedIn post from OpenAI for Business. The article quotes OpenAI saying: "Today we'r According to the same article, GPT-5.4 mini improves on GPT-5 mini across coding, reasoning, multimodal understanding, and tool use while running more than twice as fast, and approaches the performance of the larger GPT-5.4 model on SWE-Bench Pro and OSWorld-Verified. GPT-5.4 nano is positioned as the smallest, lowest-
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